Refractory material and method of making the same.



nnrrnn STATES PATENT orrion EDWARD GOODRICH ACHESON. 0F STAMFORD TOWNSHIP. ONTARIO,

CANADA, ASSIGNOR TO WlLLlAM ACHESON SMITH, OF NIAGARA,

FALLS, NQW YORK.

REFFMA'CTORY MATERIAL AND PJEEYHQD OF MAKHHG THE SEAME.

Specification of Letters Patent.

Patented Nov. 20, 1906 Application filed September 28,1905- Ecrisl Ho. 278,368.

To all whom it m/ay concern:

Be it known-that I, EDWARD Goonnrcn Acnnson, a. citizen of the United States, rcsiding in Stamford township, Untsric, Cunads, have inventsd certain now and useful Improvements in Refractory Material and Methods of Makin the Some, of which the following is a. specification.

The object of lnv invention is to provide a refractory material suitsblc for as s lining for furnaces or converters or as a material for fire-bricks, crucibles, muiflcs, rctorts, twycrs, &c.

The invention consists in a. material and u method of msliingthe some, consisting, essentially, of 8, mixture of a compound of silicon, carbon, and oxygen, and on oxidizing agcnt.

In manufacturing firebricks by molding a moistened mass of fuiely-divided siloxioon. Which is a compound of silicon, carbon, and dizygen, undiirin r to develop thc Sfiif-btlllth ing property, as isclosed in my Putcut No. 722,793, of March 17, 1903, I have noticcd that when the bricks are hosted in on oxidizing atmosphere "the surface harder and ton her than thd interior. I therefore con- Cllfl ed that the action of oxygcn increases the self-bonding property. The present invention is based on this observution thctthc self-bonding property of silicon, carbon, and

' oxygen is increased by the action of lurygen.

1n carrying out my present invention and producing the refractory material 1 mix the compound of silicon, carbon, and oxygen with a substance which under the influence of host iscc-psble of acting as an oxidizing agent.

In order to effect a thorough bonding of the component'psrticles of the mass, the compound of silicon, carbon, and oxygen is finely divided and is mixed with s small amount of an oxidizing agent. It is desirable in prscticc that this substance should not liberate its oxygen at a. low temperature, us the desirable oxidizing effect is produced only at u cornparctively high temperature. The substance suilicicnt to to h? added to the compound is preferably a. metitllic 0Xid-suc h cs oxid of manganese, iron or chrcmium'good rosults having been produced by the use of dioxid of manganese. Compounds of silicon, carbon, and oxygen as, for instance, siloxicon as commercially pro- 'duccd-usua.lly contain a smell percent age of free car'oomdnd I have found that the presence of this free carbon is not detrimental to the self-bonding property.

In practice 21. satisfactory refractory matcrinl maybe produced bycniployingnincty-two purts,by wcight, of tho conipmlnd of silicon, carbon, and oxygcn--as, for instance, siloxicon-one port of incngancse dioxid, and seven ports of carbon. 'lhcsc constituents are preferably finely divided and intimately mined. When thc mutiu'iu-l is to be used for thc various purposcs for which it is intcndcd, a sufficient amount of :1 liquid-such us wotcr, petroleum, or glycerin, or a. viscous onc, such as wntcr and dcxtrinis uddcd to bring thc muss into n plastic slutc, after which it is molded, dried, und lircd at u tcmpcrotnro givc a satisfactory bonding action.

While it is to be understood that thc prociso nature of the cilcct produccd by tho oxidizing agent and the frcc carbon, 'hcn proseut, is not accurately known. the scope of this invention is indcpcndent of ilicory, as it. has been found that the above materials furnish e mixture which is wcll adapted for the purposes intended.

-What I claim is 1. The hcrein-describod method of producing refractory mnteriflls which when heated are soli honding, which consists in mixing an oxidizing ngcnt with a compound of silicon, carbon and oxygen.

.2. The hereindcscrihcd moth l of producing refractory materials which when hcetcdnrc self-bonding, which consists in mixing an oxidizing agent with a compound of silicon, carbon and oxygen and free carbon.

3. A self-bonding material containing u compound of silicon, carbon andoxygen, and compmnd of Silicon, carbon and oxygen, a :0

an oxidizing agent. E 41A self-bonding material containing a compound of silicon, carbon and oxygen, an oxidizing agent, and free carbon. 5

5. A self-bonding material containing a compound of silicon, carbon and oxygen, and, a metallic oxid. 1

6. A self-bonding material containing a metallic oxid, and free carbon.

In testimony whereof I ailix my signature H1 presence of two witnesses.

EDWARD GOOl lRlCli AGHESUN.

Wit mosses:

EUGENE A. BYRNES,- F; L. FREEMAN. 

